Gas-meter.



A. ROGERS.

GAS METER, APPLICATION FILED MAR. 27| 1914.

l 5,141,725., )Patented June 1, 1915. /Ly. 1 2.

/m/wroR Na/u-w 19a Gems THE NORRIS PF fERS Co., PHOTO-LITHO.. WASHINGTDN. D. C.

lit

ANDREW ROGERS, 0F WELLINGTON, NEW ZEALAND.

Y' GAS-METER.

Specification of Letters Patent.

Patented June 1, 1915.

Application led March 27, 1914. Serial No. 827,636.

T0 all whom t may concern:

Be it known that I, ANDREW ROGERS, a subject of His Majesty the King of Great Britain and Ireland, residing at No. 81 Pirie street, in the city of Wellington, in the Dominion "of New Zealand, have invented new and useful Improvements in GasfMeters, of which the following is a specification.

This invention relates to gas-registration meters of the kind known as wet meters.

The object of the invention is to provide a v`meter in which an increase of the pressure of gas in the mains will not overcome the water-seal between the inlet chamber and the registering chamber and allow the gas to pass to the registering drum without operating it. Y

Hitherto an increase of gas pressure tended to overcome the water-seal between the inlet chamber and the registering chamber. This allows the gas to pass through the registering chamber to the outlet pipe without rotating the registering drum. Y

According to this invention an equilibrium of pressure is lobtained upon the water seal in the inlet chamber and in the registering chamber.

The construction of the apparatus will be described with reference to the accompanying drawings wherein Figure 1 is a front sectional elevation. Fig. 2 is a cross sectional elevation on line A-A, Fig. 1. Fig. 3 is a similar section on line B-B Fig. 1. Fig. 4 is a diagrammatic sectional view designed to show clearly the operation of the invention.

Referring to the drawingsz-The meter comprises an inlet chamber 1, registering chamber 2, registeringdrumf 3, and float valve 4 of ordinary construction; The usual filling tube 5 is provided and passesv into the inlet chamber 1. divided from the registering chamber by a vertical partition 6 while below the inlet chamber a water seal compartment is divided from the inlet chamber by a horizontal partition 7. The entrance pipe 8 located in the partition 7 has the usual branch 9 projecting through the partition 6 and into the registering drum 3. The joint where the branch 9 passes through the partition 6 is made water-tight so that water cannot pass into the chamber 2 at this point. The lcwer end of the entrance pipe 8 communicates,

The inlet chamber 1 is with a closed chamber 10 upon the under side of the partition 7.

A passage 11 leads from the partition 7 of the inlet chamber and communicates with the lower part of the registering chamber as shown in Figs. 3 and 4. This passage is the onlycommunication that the inlet chamber has with the chamber 2, so that water passing to the registering chamber must pass through this passage only, since no water can enter the chamber 2 through the branch 9 of the pipe 8 owing to the top of the branch 9 being above the water level the height of which is governed by the height of the pipe 8.

The space below the partition 7 is divided into chambers 12 and 13 by a vertical partition 14. Into the chamber 12 a pipe 15 depends downwardly a desired distance from the chamber 10. An orice 16 at the top of the chamber 12 makes communication between the two chambers 12 and 13.

From near the bottom of the chamber 13 a passage 17 extends upward a desired distance and leads to the overflow opening 18 in the cover 19 of the front of the meter. The lower end of the passage 17 forms a water-seal as shown in Fig. 4.

`The chamber 10 has an air or gas outlet pipe 2O extending upward into the inlet chamber and above the water level.

When water is poured into the inlet chamber l through the illing tube 5, it flows through the passage 11 into the registering chamber 2 as indicated by the arrows shown in Fi 4, and fills both the chamber 1 and the iainber 2 to the level shown in Fig. 4. As the Water continues to flow into the tube 5 it will overflow into the entrance pipe 8 and flow into the closed chamber l0. The water then flows through the pipe 15 into the chamber 12 lling it to the height of the orifice 16 through which it now flows into the chamber 13. From this chamber 13 the water will pass out through the overflow 18 by means of the passage 17. The direction of the flow is indicated by arrows in Fig. 4. As the gas comes into the inlet chamber 1 it immediately passes through the entrance pipe 8 and branch 9 into the registering drum 3, and establishes the same pressure upon the surface of the water within the registering drum 3 as in the chamber 1. The gas cannot pass into the registering chamber otherwise than through the entrance pipe 8 and drum 3 as already explained. It will be seen that there is a laige head of water between the water level in the chamber 1 and the bottomr of VVthe passage 17 and an equally'large head of yWater between the bottom of this passage 'and the level of the water in the registering i chamber 2. This head of water will be such as to resist the gas pressure that will be introduced into the chamber 1. Further since the water vforming the seal between Athe inlet chamber and the registering chamber has no communication with the overflow pipe it cannot be forced out by an increase of gas pressure. The chamber 12 and pipe 15 depending into it also contain a sufficient head of water to prevent the gas pressure overcoming it. Since the area of the surface of the water in the pipe 15 exposed to the gas pressure is very small in comparison'to the surface of the water in the chamber 12 that is exposed to air pressure or containing as it does a large head of water, the water in thisl chamber will not be forced out of the chamber by the gas pressure.

I claim e 1. In a gas meter, an inlet chamber, a registering'chamber, a partition separating said chambers and a passage for water leading from said inlet chamber to the registering chamber at such a position below the water level in said inlet chamber whereby when the water level is lowered in said inlet cham'- ber through unequal pressures in said chambers'the head of water between said cham-V bers will prevent gas passing from said inlet chamber to said registering chamber, substantiallyvas set forth.

' 2. In a gas meter, aninlet chamber, a registering chamber, a passage for water leading from said inlet chamber to the bottom of said registering chamber, a water seal compartmentl having a water'overflow to the exterior of the meter, and an entrance pipe forming apassage for gas from said inlet chamber into said registering chamber and alsoV forming a water overflow from saidinlet chamber to said water seal compartment, substantially as set forth.`

- 3. In a gas meter, an inlet chamber, a registering chamber, a water seal compartment (fopipea of this patent may be obtainedv for Y Washington, D. C.V i

Yhaving a water overow to the exterior of the meter, an entrance pipe forming a passage for gas from said inlet chamber into said registering chamber and also forming*V a water overflow from said inlet chamber to'A said water seal compartment, and apassage for water between said chambers at such a Y Y position below the water level in said Vchambers whereby the head of water between said chambers will prevent gas being forced into said registering chamber other than through` said entrance pipe substantially as set forth.` 4. In a gas meter, an inlet chamber, a reg-V 5. In a gas meter, an inlet chamber, a registering chamber, a passagefor Water lead-- ing from said inlet chamber to the registering. chamber, aVwater-seal compartment having a Water overflow to the interior ofthe meter, an entrance pipeforming a passage Y A forgas from said inletl chamber .into said registering chamber, a closed Vchamber Ywith which the bottom of said entrance pipe communicates, said water seal compartment being dividedinto two chambers,y a pipe from said closed chamber depending into oneV of said chambers, an orifice near the top of said chamber whereby water overflows from said chamber into the other chamber, and means in said other chamber whereby the water reaches the overflow pipe of said water-seal compartment, substantially as setvforth.

Y ANDREW ROGERS Witnesses: ,Y i i JAMES McIN'rosH,

CHARLES' JAMES Looirwoon.

five cents each, `by addressing the commissioner of ."aieiitsr,V 

